Title:
ELEVATOR POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/030194
Kind Code:
A1
Abstract:
The present invention is provided with: an inverter (8) that, with an MOSFET element (21) and a diode element (22) connected in antiparallel as one arm (20), has at least two legs (23) comprising two arms (20) connected in series, and drives an electric motor (1) that raises/lowers an elevator car (4); a current detector (13) that detects the direction of current flowing between the inverter (8) and the electric motor (1); and a drive control unit (9) that controls the driving of the inverter (8) on the basis of a speed command value generated by a driving control unit (10) having an automatic driving mode and a conservative driving mode. When the speed command value is no greater than a speed in the conservative driving mode, the drive control unit (9) turns off the gate of the MOSFET element (21) of the arm (20) through which the direction of the current detected by the current detector (13) is flowing in the forward direction of the diode element (22).
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Inventors:
OTSU KAZUHIRO (JP)
Application Number:
PCT/JP2012/005331
Publication Date:
February 27, 2014
Filing Date:
August 24, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
OTSU KAZUHIRO (JP)
OTSU KAZUHIRO (JP)
International Classes:
B66B1/30; H02M7/48; H02M7/537
Foreign References:
| JP2010017061A | 2010-01-21 | |||
| JPS63225083A | 1988-09-20 | |||
| JP2012029490A | 2012-02-09 | |||
| JPH04191261A | 1992-07-09 | |||
| JP2005137179A | 2005-05-26 |
Attorney, Agent or Firm:
TAKAHASHI, Shogo et al. (JP)
Shogo Takahashi (JP)
Shogo Takahashi (JP)
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